Energy Transfer and Temperature

A student wishes to investigate how the material of which an object is made affects how the object changes temperature. The student will heat objects to a temperature of 50°C, then see how long it takes the objects to cool down to room temperature. For this investigation, it is most important that the student use objects that

• are the same size, but made of different materials.

• will not melt at temperatures about 100°C.

• release thermal energy quickly to the environment.

• are made of metals, since they conduct heat.

Tags

NGSS.MS-PS3-4

Heat will continue to transfer between two areas or objects until

• both areas/objects are the same temperature

• the melting point is reached

• all heat energy is lost to the air

• the colder object absorbs all of the heat energy

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which of the following best explains why the end of a spoon sticking out of a cup of hot water also gets hot just like the end of the spoon in the hot water?

• The hot water causes a chemical reaction to take place.

• The heat from the hot water is conducted through the spoon.

• The heat from the hot water is convected through the spoon.

• Radiation from the sun warms the other end.

Thermal energy always transfers from:

• a cold to a hot object

• a cold to a cool object

• a hot to a cold object

• a hot to a hotter object

What do you call the transfer of heat from one place to another by movement of liquids and gases?

• Conduction

• Convection

• Radiation

Tags

NGSS.MS-ESS2-6

The relationship between the temperature of a system and the total energy of the system depends on what factors?

• Whether or not all the parts of the system are connected

• The ability of scientists to accurately measure the thermal energy of the system

• Whether or not the system is in motion at the time

• The type, states, and amount of matter in the system.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The relationship between the temperature and the total energy of a system depends on all of the following EXCEPT

• the color of matter present.

• the type of matter present.

• the amount of matter present.

• the state of matter present.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

An investigation to determine which material can maximize heat energy transfer would most likely include which of the following?

• Hot water placed in containers made of different substances

• Ice cubes sealed in containers of various sizes

• Metal objects heated to a variety of temperatures

• Air temperatures recorded at different times of day

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

When you dive to the bottom of a pool, you notice that the water is cooler at the bottom than at the top. Which statement best describes why this would be true?

• The cooler water is denser, so it sinks beneath the warmer water.

• The cooler water is less dense, so it sinks beneath the warmer water.

• The density of the warm water and cool water are the same, but the sun reaches the top layer first.

• Warm water rises because of conduction.

Energy fro the sun reaches earth by

• conduction

• convection

• radiation